1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 *
4 * Copyright Adrian McMenamin 2005, 2006, 2007
5 * <adrian@mcmen.demon.co.uk>
6 * Requires firmware (BSD licenced) available from:
7 * http://linuxdc.cvs.sourceforge.net/linuxdc/linux-sh-dc/sound/oss/aica/firmware/
8 * or the maintainer
9 */
10
11 #include <linux/init.h>
12 #include <linux/jiffies.h>
13 #include <linux/slab.h>
14 #include <linux/time.h>
15 #include <linux/wait.h>
16 #include <linux/module.h>
17 #include <linux/platform_device.h>
18 #include <linux/firmware.h>
19 #include <linux/timer.h>
20 #include <linux/delay.h>
21 #include <linux/workqueue.h>
22 #include <linux/io.h>
23 #include <sound/core.h>
24 #include <sound/control.h>
25 #include <sound/pcm.h>
26 #include <sound/initval.h>
27 #include <sound/info.h>
28 #include <asm/dma.h>
29 #include <mach/sysasic.h>
30 #include "aica.h"
31
32 MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");
33 MODULE_DESCRIPTION("Dreamcast AICA sound (pcm) driver");
34 MODULE_LICENSE("GPL");
35 MODULE_FIRMWARE("aica_firmware.bin");
36
37 /* module parameters */
38 #define CARD_NAME "AICA"
39 static int index = -1;
40 static char *id;
41 static bool enable = 1;
42 module_param(index, int, 0444);
43 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
44 module_param(id, charp, 0444);
45 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
46 module_param(enable, bool, 0644);
47 MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
48
49 /* Simple platform device */
50 static struct platform_device *pd;
51 static struct resource aica_memory_space[2] = {
52 {
53 .name = "AICA ARM CONTROL",
54 .start = ARM_RESET_REGISTER,
55 .flags = IORESOURCE_MEM,
56 .end = ARM_RESET_REGISTER + 3,
57 },
58 {
59 .name = "AICA Sound RAM",
60 .start = SPU_MEMORY_BASE,
61 .flags = IORESOURCE_MEM,
62 .end = SPU_MEMORY_BASE + 0x200000 - 1,
63 },
64 };
65
66 /* SPU specific functions */
67 /* spu_write_wait - wait for G2-SH FIFO to clear */
spu_write_wait(void)68 static void spu_write_wait(void)
69 {
70 int time_count;
71 time_count = 0;
72 while (1) {
73 if (!(readl(G2_FIFO) & 0x11))
74 break;
75 /* To ensure hardware failure doesn't wedge kernel */
76 time_count++;
77 if (time_count > 0x10000) {
78 pr_warn("WARNING: G2 FIFO appears to be blocked.\n");
79 break;
80 }
81 }
82 }
83
84 /* spu_memset - write to memory in SPU address space */
spu_memset(u32 toi,u32 what,int length)85 static void spu_memset(u32 toi, u32 what, int length)
86 {
87 int i;
88 unsigned long flags;
89 if (snd_BUG_ON(length % 4))
90 return;
91 for (i = 0; i < length; i++) {
92 if (!(i % 8))
93 spu_write_wait();
94 local_irq_save(flags);
95 writel(what, toi + SPU_MEMORY_BASE);
96 local_irq_restore(flags);
97 toi++;
98 }
99 }
100
101 /* spu_memload - write to SPU address space */
spu_memload(u32 toi,const void * from,int length)102 static void spu_memload(u32 toi, const void *from, int length)
103 {
104 unsigned long flags;
105 const u32 *froml = from;
106 u32 __iomem *to = (u32 __iomem *) (SPU_MEMORY_BASE + toi);
107 int i;
108 u32 val;
109 length = DIV_ROUND_UP(length, 4);
110 spu_write_wait();
111 for (i = 0; i < length; i++) {
112 if (!(i % 8))
113 spu_write_wait();
114 val = *froml;
115 local_irq_save(flags);
116 writel(val, to);
117 local_irq_restore(flags);
118 froml++;
119 to++;
120 }
121 }
122
123 /* spu_disable - set spu registers to stop sound output */
spu_disable(void)124 static void spu_disable(void)
125 {
126 int i;
127 unsigned long flags;
128 u32 regval;
129 spu_write_wait();
130 regval = readl(ARM_RESET_REGISTER);
131 regval |= 1;
132 spu_write_wait();
133 local_irq_save(flags);
134 writel(regval, ARM_RESET_REGISTER);
135 local_irq_restore(flags);
136 for (i = 0; i < 64; i++) {
137 spu_write_wait();
138 regval = readl(SPU_REGISTER_BASE + (i * 0x80));
139 regval = (regval & ~0x4000) | 0x8000;
140 spu_write_wait();
141 local_irq_save(flags);
142 writel(regval, SPU_REGISTER_BASE + (i * 0x80));
143 local_irq_restore(flags);
144 }
145 }
146
147 /* spu_enable - set spu registers to enable sound output */
spu_enable(void)148 static void spu_enable(void)
149 {
150 unsigned long flags;
151 u32 regval = readl(ARM_RESET_REGISTER);
152 regval &= ~1;
153 spu_write_wait();
154 local_irq_save(flags);
155 writel(regval, ARM_RESET_REGISTER);
156 local_irq_restore(flags);
157 }
158
159 /*
160 * Halt the sound processor, clear the memory,
161 * load some default ARM7 code, and then restart ARM7
162 */
spu_reset(void)163 static void spu_reset(void)
164 {
165 unsigned long flags;
166 spu_disable();
167 spu_memset(0, 0, 0x200000 / 4);
168 /* Put ARM7 in endless loop */
169 local_irq_save(flags);
170 __raw_writel(0xea000002, SPU_MEMORY_BASE);
171 local_irq_restore(flags);
172 spu_enable();
173 }
174
175 /* aica_chn_start - write to spu to start playback */
aica_chn_start(void)176 static void aica_chn_start(void)
177 {
178 unsigned long flags;
179 spu_write_wait();
180 local_irq_save(flags);
181 writel(AICA_CMD_KICK | AICA_CMD_START, (u32 *) AICA_CONTROL_POINT);
182 local_irq_restore(flags);
183 }
184
185 /* aica_chn_halt - write to spu to halt playback */
aica_chn_halt(void)186 static void aica_chn_halt(void)
187 {
188 unsigned long flags;
189 spu_write_wait();
190 local_irq_save(flags);
191 writel(AICA_CMD_KICK | AICA_CMD_STOP, (u32 *) AICA_CONTROL_POINT);
192 local_irq_restore(flags);
193 }
194
195 /* ALSA code below */
196 static const struct snd_pcm_hardware snd_pcm_aica_playback_hw = {
197 .info = (SNDRV_PCM_INFO_NONINTERLEAVED),
198 .formats =
199 (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |
200 SNDRV_PCM_FMTBIT_IMA_ADPCM),
201 .rates = SNDRV_PCM_RATE_8000_48000,
202 .rate_min = 8000,
203 .rate_max = 48000,
204 .channels_min = 1,
205 .channels_max = 2,
206 .buffer_bytes_max = AICA_BUFFER_SIZE,
207 .period_bytes_min = AICA_PERIOD_SIZE,
208 .period_bytes_max = AICA_PERIOD_SIZE,
209 .periods_min = AICA_PERIOD_NUMBER,
210 .periods_max = AICA_PERIOD_NUMBER,
211 };
212
aica_dma_transfer(int channels,int buffer_size,struct snd_pcm_substream * substream)213 static int aica_dma_transfer(int channels, int buffer_size,
214 struct snd_pcm_substream *substream)
215 {
216 int q, err, period_offset;
217 struct snd_card_aica *dreamcastcard;
218 struct snd_pcm_runtime *runtime;
219 unsigned long flags;
220 err = 0;
221 dreamcastcard = substream->pcm->private_data;
222 period_offset = dreamcastcard->clicks;
223 period_offset %= (AICA_PERIOD_NUMBER / channels);
224 runtime = substream->runtime;
225 for (q = 0; q < channels; q++) {
226 local_irq_save(flags);
227 err = dma_xfer(AICA_DMA_CHANNEL,
228 (unsigned long) (runtime->dma_area +
229 (AICA_BUFFER_SIZE * q) /
230 channels +
231 AICA_PERIOD_SIZE *
232 period_offset),
233 AICA_CHANNEL0_OFFSET + q * CHANNEL_OFFSET +
234 AICA_PERIOD_SIZE * period_offset,
235 buffer_size / channels, AICA_DMA_MODE);
236 if (unlikely(err < 0)) {
237 local_irq_restore(flags);
238 break;
239 }
240 dma_wait_for_completion(AICA_DMA_CHANNEL);
241 local_irq_restore(flags);
242 }
243 return err;
244 }
245
startup_aica(struct snd_card_aica * dreamcastcard)246 static void startup_aica(struct snd_card_aica *dreamcastcard)
247 {
248 spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
249 dreamcastcard->channel, sizeof(struct aica_channel));
250 aica_chn_start();
251 }
252
run_spu_dma(struct work_struct * work)253 static void run_spu_dma(struct work_struct *work)
254 {
255 int buffer_size;
256 struct snd_pcm_runtime *runtime;
257 struct snd_card_aica *dreamcastcard;
258 dreamcastcard =
259 container_of(work, struct snd_card_aica, spu_dma_work);
260 runtime = dreamcastcard->substream->runtime;
261 if (unlikely(dreamcastcard->dma_check == 0)) {
262 buffer_size =
263 frames_to_bytes(runtime, runtime->buffer_size);
264 if (runtime->channels > 1)
265 dreamcastcard->channel->flags |= 0x01;
266 aica_dma_transfer(runtime->channels, buffer_size,
267 dreamcastcard->substream);
268 startup_aica(dreamcastcard);
269 dreamcastcard->clicks =
270 buffer_size / (AICA_PERIOD_SIZE * runtime->channels);
271 return;
272 } else {
273 aica_dma_transfer(runtime->channels,
274 AICA_PERIOD_SIZE * runtime->channels,
275 dreamcastcard->substream);
276 snd_pcm_period_elapsed(dreamcastcard->substream);
277 dreamcastcard->clicks++;
278 if (unlikely(dreamcastcard->clicks >= AICA_PERIOD_NUMBER))
279 dreamcastcard->clicks %= AICA_PERIOD_NUMBER;
280 if (snd_pcm_running(dreamcastcard->substream))
281 mod_timer(&dreamcastcard->timer, jiffies + 1);
282 }
283 }
284
aica_period_elapsed(struct timer_list * t)285 static void aica_period_elapsed(struct timer_list *t)
286 {
287 struct snd_card_aica *dreamcastcard = from_timer(dreamcastcard,
288 t, timer);
289 struct snd_pcm_substream *substream = dreamcastcard->substream;
290 /*timer function - so cannot sleep */
291 int play_period;
292 struct snd_pcm_runtime *runtime;
293 if (!snd_pcm_running(substream))
294 return;
295 runtime = substream->runtime;
296 dreamcastcard = substream->pcm->private_data;
297 /* Have we played out an additional period? */
298 play_period =
299 frames_to_bytes(runtime,
300 readl
301 (AICA_CONTROL_CHANNEL_SAMPLE_NUMBER)) /
302 AICA_PERIOD_SIZE;
303 if (play_period == dreamcastcard->current_period) {
304 /* reschedule the timer */
305 mod_timer(&(dreamcastcard->timer), jiffies + 1);
306 return;
307 }
308 if (runtime->channels > 1)
309 dreamcastcard->current_period = play_period;
310 if (unlikely(dreamcastcard->dma_check == 0))
311 dreamcastcard->dma_check = 1;
312 schedule_work(&(dreamcastcard->spu_dma_work));
313 }
314
spu_begin_dma(struct snd_pcm_substream * substream)315 static void spu_begin_dma(struct snd_pcm_substream *substream)
316 {
317 struct snd_card_aica *dreamcastcard;
318 dreamcastcard = substream->pcm->private_data;
319 /*get the queue to do the work */
320 schedule_work(&(dreamcastcard->spu_dma_work));
321 mod_timer(&dreamcastcard->timer, jiffies + 4);
322 }
323
snd_aicapcm_pcm_open(struct snd_pcm_substream * substream)324 static int snd_aicapcm_pcm_open(struct snd_pcm_substream
325 *substream)
326 {
327 struct snd_pcm_runtime *runtime;
328 struct aica_channel *channel;
329 struct snd_card_aica *dreamcastcard;
330 if (!enable)
331 return -ENOENT;
332 dreamcastcard = substream->pcm->private_data;
333 channel = kmalloc(sizeof(struct aica_channel), GFP_KERNEL);
334 if (!channel)
335 return -ENOMEM;
336 /* set defaults for channel */
337 channel->sfmt = SM_8BIT;
338 channel->cmd = AICA_CMD_START;
339 channel->vol = dreamcastcard->master_volume;
340 channel->pan = 0x80;
341 channel->pos = 0;
342 channel->flags = 0; /* default to mono */
343 dreamcastcard->channel = channel;
344 runtime = substream->runtime;
345 runtime->hw = snd_pcm_aica_playback_hw;
346 spu_enable();
347 dreamcastcard->clicks = 0;
348 dreamcastcard->current_period = 0;
349 dreamcastcard->dma_check = 0;
350 return 0;
351 }
352
snd_aicapcm_pcm_sync_stop(struct snd_pcm_substream * substream)353 static int snd_aicapcm_pcm_sync_stop(struct snd_pcm_substream *substream)
354 {
355 struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
356
357 del_timer_sync(&dreamcastcard->timer);
358 cancel_work_sync(&dreamcastcard->spu_dma_work);
359 return 0;
360 }
361
snd_aicapcm_pcm_close(struct snd_pcm_substream * substream)362 static int snd_aicapcm_pcm_close(struct snd_pcm_substream
363 *substream)
364 {
365 struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
366 dreamcastcard->substream = NULL;
367 kfree(dreamcastcard->channel);
368 spu_disable();
369 return 0;
370 }
371
snd_aicapcm_pcm_prepare(struct snd_pcm_substream * substream)372 static int snd_aicapcm_pcm_prepare(struct snd_pcm_substream
373 *substream)
374 {
375 struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
376 if ((substream->runtime)->format == SNDRV_PCM_FORMAT_S16_LE)
377 dreamcastcard->channel->sfmt = SM_16BIT;
378 dreamcastcard->channel->freq = substream->runtime->rate;
379 dreamcastcard->substream = substream;
380 return 0;
381 }
382
snd_aicapcm_pcm_trigger(struct snd_pcm_substream * substream,int cmd)383 static int snd_aicapcm_pcm_trigger(struct snd_pcm_substream
384 *substream, int cmd)
385 {
386 switch (cmd) {
387 case SNDRV_PCM_TRIGGER_START:
388 spu_begin_dma(substream);
389 break;
390 case SNDRV_PCM_TRIGGER_STOP:
391 aica_chn_halt();
392 break;
393 default:
394 return -EINVAL;
395 }
396 return 0;
397 }
398
snd_aicapcm_pcm_pointer(struct snd_pcm_substream * substream)399 static unsigned long snd_aicapcm_pcm_pointer(struct snd_pcm_substream
400 *substream)
401 {
402 return readl(AICA_CONTROL_CHANNEL_SAMPLE_NUMBER);
403 }
404
405 static const struct snd_pcm_ops snd_aicapcm_playback_ops = {
406 .open = snd_aicapcm_pcm_open,
407 .close = snd_aicapcm_pcm_close,
408 .prepare = snd_aicapcm_pcm_prepare,
409 .trigger = snd_aicapcm_pcm_trigger,
410 .pointer = snd_aicapcm_pcm_pointer,
411 .sync_stop = snd_aicapcm_pcm_sync_stop,
412 };
413
414 /* TO DO: set up to handle more than one pcm instance */
snd_aicapcmchip(struct snd_card_aica * dreamcastcard,int pcm_index)415 static int __init snd_aicapcmchip(struct snd_card_aica
416 *dreamcastcard, int pcm_index)
417 {
418 struct snd_pcm *pcm;
419 int err;
420 /* AICA has no capture ability */
421 err =
422 snd_pcm_new(dreamcastcard->card, "AICA PCM", pcm_index, 1, 0,
423 &pcm);
424 if (unlikely(err < 0))
425 return err;
426 pcm->private_data = dreamcastcard;
427 strcpy(pcm->name, "AICA PCM");
428 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
429 &snd_aicapcm_playback_ops);
430 /* Allocate the DMA buffers */
431 snd_pcm_set_managed_buffer_all(pcm,
432 SNDRV_DMA_TYPE_CONTINUOUS,
433 NULL,
434 AICA_BUFFER_SIZE,
435 AICA_BUFFER_SIZE);
436 return 0;
437 }
438
439 /* Mixer controls */
440 #define aica_pcmswitch_info snd_ctl_boolean_mono_info
441
aica_pcmswitch_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)442 static int aica_pcmswitch_get(struct snd_kcontrol *kcontrol,
443 struct snd_ctl_elem_value *ucontrol)
444 {
445 ucontrol->value.integer.value[0] = 1; /* TO DO: Fix me */
446 return 0;
447 }
448
aica_pcmswitch_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)449 static int aica_pcmswitch_put(struct snd_kcontrol *kcontrol,
450 struct snd_ctl_elem_value *ucontrol)
451 {
452 if (ucontrol->value.integer.value[0] == 1)
453 return 0; /* TO DO: Fix me */
454 else
455 aica_chn_halt();
456 return 0;
457 }
458
aica_pcmvolume_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)459 static int aica_pcmvolume_info(struct snd_kcontrol *kcontrol,
460 struct snd_ctl_elem_info *uinfo)
461 {
462 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
463 uinfo->count = 1;
464 uinfo->value.integer.min = 0;
465 uinfo->value.integer.max = 0xFF;
466 return 0;
467 }
468
aica_pcmvolume_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)469 static int aica_pcmvolume_get(struct snd_kcontrol *kcontrol,
470 struct snd_ctl_elem_value *ucontrol)
471 {
472 struct snd_card_aica *dreamcastcard;
473 dreamcastcard = kcontrol->private_data;
474 if (unlikely(!dreamcastcard->channel))
475 return -ETXTBSY; /* we've not yet been set up */
476 ucontrol->value.integer.value[0] = dreamcastcard->channel->vol;
477 return 0;
478 }
479
aica_pcmvolume_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)480 static int aica_pcmvolume_put(struct snd_kcontrol *kcontrol,
481 struct snd_ctl_elem_value *ucontrol)
482 {
483 struct snd_card_aica *dreamcastcard;
484 unsigned int vol;
485 dreamcastcard = kcontrol->private_data;
486 if (unlikely(!dreamcastcard->channel))
487 return -ETXTBSY;
488 vol = ucontrol->value.integer.value[0];
489 if (vol > 0xff)
490 return -EINVAL;
491 if (unlikely(dreamcastcard->channel->vol == vol))
492 return 0;
493 dreamcastcard->channel->vol = ucontrol->value.integer.value[0];
494 dreamcastcard->master_volume = ucontrol->value.integer.value[0];
495 spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
496 dreamcastcard->channel, sizeof(struct aica_channel));
497 return 1;
498 }
499
500 static const struct snd_kcontrol_new snd_aica_pcmswitch_control = {
501 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
502 .name = "PCM Playback Switch",
503 .index = 0,
504 .info = aica_pcmswitch_info,
505 .get = aica_pcmswitch_get,
506 .put = aica_pcmswitch_put
507 };
508
509 static const struct snd_kcontrol_new snd_aica_pcmvolume_control = {
510 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
511 .name = "PCM Playback Volume",
512 .index = 0,
513 .info = aica_pcmvolume_info,
514 .get = aica_pcmvolume_get,
515 .put = aica_pcmvolume_put
516 };
517
load_aica_firmware(void)518 static int load_aica_firmware(void)
519 {
520 int err;
521 const struct firmware *fw_entry;
522 spu_reset();
523 err = request_firmware(&fw_entry, "aica_firmware.bin", &pd->dev);
524 if (unlikely(err))
525 return err;
526 /* write firmware into memory */
527 spu_disable();
528 spu_memload(0, fw_entry->data, fw_entry->size);
529 spu_enable();
530 release_firmware(fw_entry);
531 return err;
532 }
533
add_aicamixer_controls(struct snd_card_aica * dreamcastcard)534 static int add_aicamixer_controls(struct snd_card_aica *dreamcastcard)
535 {
536 int err;
537 err = snd_ctl_add
538 (dreamcastcard->card,
539 snd_ctl_new1(&snd_aica_pcmvolume_control, dreamcastcard));
540 if (unlikely(err < 0))
541 return err;
542 err = snd_ctl_add
543 (dreamcastcard->card,
544 snd_ctl_new1(&snd_aica_pcmswitch_control, dreamcastcard));
545 if (unlikely(err < 0))
546 return err;
547 return 0;
548 }
549
snd_aica_remove(struct platform_device * devptr)550 static void snd_aica_remove(struct platform_device *devptr)
551 {
552 struct snd_card_aica *dreamcastcard;
553 dreamcastcard = platform_get_drvdata(devptr);
554 snd_card_free(dreamcastcard->card);
555 kfree(dreamcastcard);
556 }
557
snd_aica_probe(struct platform_device * devptr)558 static int snd_aica_probe(struct platform_device *devptr)
559 {
560 int err;
561 struct snd_card_aica *dreamcastcard;
562 dreamcastcard = kzalloc(sizeof(struct snd_card_aica), GFP_KERNEL);
563 if (unlikely(!dreamcastcard))
564 return -ENOMEM;
565 err = snd_card_new(&devptr->dev, index, SND_AICA_DRIVER,
566 THIS_MODULE, 0, &dreamcastcard->card);
567 if (unlikely(err < 0)) {
568 kfree(dreamcastcard);
569 return err;
570 }
571 strcpy(dreamcastcard->card->driver, "snd_aica");
572 strcpy(dreamcastcard->card->shortname, SND_AICA_DRIVER);
573 strcpy(dreamcastcard->card->longname,
574 "Yamaha AICA Super Intelligent Sound Processor for SEGA Dreamcast");
575 /* Prepare to use the queue */
576 INIT_WORK(&(dreamcastcard->spu_dma_work), run_spu_dma);
577 timer_setup(&dreamcastcard->timer, aica_period_elapsed, 0);
578 /* Load the PCM 'chip' */
579 err = snd_aicapcmchip(dreamcastcard, 0);
580 if (unlikely(err < 0))
581 goto freedreamcast;
582 /* Add basic controls */
583 err = add_aicamixer_controls(dreamcastcard);
584 if (unlikely(err < 0))
585 goto freedreamcast;
586 /* Register the card with ALSA subsystem */
587 err = snd_card_register(dreamcastcard->card);
588 if (unlikely(err < 0))
589 goto freedreamcast;
590 platform_set_drvdata(devptr, dreamcastcard);
591 dev_info(&devptr->dev,
592 "ALSA Driver for Yamaha AICA Super Intelligent Sound Processor\n");
593 return 0;
594 freedreamcast:
595 snd_card_free(dreamcastcard->card);
596 kfree(dreamcastcard);
597 return err;
598 }
599
600 static struct platform_driver snd_aica_driver = {
601 .probe = snd_aica_probe,
602 .remove = snd_aica_remove,
603 .driver = {
604 .name = SND_AICA_DRIVER,
605 },
606 };
607
aica_init(void)608 static int __init aica_init(void)
609 {
610 int err;
611 err = platform_driver_register(&snd_aica_driver);
612 if (unlikely(err < 0))
613 return err;
614 pd = platform_device_register_simple(SND_AICA_DRIVER, -1,
615 aica_memory_space, 2);
616 if (IS_ERR(pd)) {
617 platform_driver_unregister(&snd_aica_driver);
618 return PTR_ERR(pd);
619 }
620 /* Load the firmware */
621 return load_aica_firmware();
622 }
623
aica_exit(void)624 static void __exit aica_exit(void)
625 {
626 platform_device_unregister(pd);
627 platform_driver_unregister(&snd_aica_driver);
628 /* Kill any sound still playing and reset ARM7 to safe state */
629 spu_reset();
630 }
631
632 module_init(aica_init);
633 module_exit(aica_exit);
634